Volodymyr Taran with NOC workers created the design of the stamp and envelope.

Everyone can take part in this flashmob. All you need is to write a letter to a sportsman, put it in this special envelope with the stamp and send it to the NOC. The participants also need to put flashmob hashtag #UWinRio.

All the letters will be given to the sportsmen personally.

The letters will take part in the giveaway from the National Olympic Committee.